The family have been quoted a cost of up to £40,000 to get Jones home, as he would need medical care throughout his repatriation.
“We knew he was a popular kid, but I mean, the way that everyone’s come together and donated in whatever way they can, whether it’s a pound, whether it’s five pound, it all adds up,” said Gray.
“It really does make the difference.”
He said two close friends had travelled to Crete to be with the couple.
Jones, who is a former Royal engineer and a serving member of the territorial army, kept himself fit by going to the gym every day, Gray said.
He said he hoped his brother’s fitness would give him the best possible chance of recovery, and had contacted his local MP for help to get him home.